TRANSMITTERS & TRANSCEIVERS

Type 634 Transmitter

DATE OF DESIGN

FREQUENCY RANGE

240 to 300 MHz (six spot frequencies). Channel spacing 100 kHz.

POWER SUPPLIES

Rechargeable, sealed 12 V battery, or from an external 12 V supply. Battery life is 12 hours on Receive only, 2 hours on normal voice operation. For beacon use an external supply should always be used.

RANGE IN MILES.

Ranges in statute miles depend on the type of terrain, height of the distant station and the aerial used. Using the manpack about 4 miles is normal, but if the distant station is at 5000 ft a range of 45 miles is possible. With the Discone Antenna, up to 160 miles has been obtained with the distanct station at 30,000 ft high.

TYPE OF SET (VALVES USED)

WAVEFORM

AM (A3), Beacon CW (A0), Beacon MCW (A2).

ASSOCIATED WAVEMETER.

METHOD OF PRODUCING OSCILLATIONS

WHERE USED/FITTED

A UHF portable transmitter/receiver with beacon facilities, designed for ARMY manpack or ground station use.

FURTHER READING

PHOTOS, SCHEMATICS, DOCUMENTS

Details of Transmitter Type 634.

NOTES.

BR 2365.